A triple square thread power screw with a major diameter of 28-mm and a pitch of 8-mm is used to shift an effective load of 15KN quickly between two points. The hard steel screw (AISI 1050, cold drawn) runs in a lubricated nut with an effective friction of 0.15. The 38 mm diameter collar forms an integral part with the screw, supported in a bronze bush. Allowing for a factor of safety of 3, determine the: a. Thread depth, thread width, mean or pitch diameter, minor diameter, and lead. b. Torque required to rotate the screw "against" the load. c. Torque required to rotate the screw “with" the load.
A triple square thread power screw with a major diameter of 28-mm and a pitch of 8-mm is used to shift an effective load of 15KN quickly between two points. The hard steel screw (AISI 1050, cold drawn) runs in a lubricated nut with an effective friction of 0.15. The 38 mm diameter collar forms an integral part with the screw, supported in a bronze bush. Allowing for a factor of safety of 3, determine the: a. Thread depth, thread width, mean or pitch diameter, minor diameter, and lead. b. Torque required to rotate the screw "against" the load. c. Torque required to rotate the screw “with" the load.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A triple square thread power screw with a major diameter of 28-mm and a pitch of 8-mm is used to shift an
effective load of 15KN quickly between two points. The hard steel screw (AISI 1050, cold drawn) runs in a
lubricated nut with an effective friction of 0.15. The 38 mm diameter collar forms an integral part with the
screw, supported in a bronze bush. Allowing for a factor of safety of 3, determine the:
a. Thread depth, thread width, mean or pitch diameter, minor diameter, and lead.
b. Torque required to rotate the screw "against" the load.
c. Torque required to rotate the screw “with" the load.
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